Watch again. Sergio's knees were performing fine until Cotto cracked his head

[GorgeousJorge]

Just watched it again. Sergio's footwork is fine, he is moving well and looks healthy. But then he gets hit and put on ***** street by Cotto and then he falls.

After he falls, gets back up and walks around all normal again. The only thing shot about Sergio was his head after Cotto cracked it. Sergio's legs looked like Amir Khans do after he gets cracked and Amir has no knee problems